In January of 2007, the PBS show NOVA Science Now aired a short clip (about 12 minutes) on building a Space Elevator.  This clip was narrated by the esteemed Neil deGrasse Tyson.  I blogged about it a few times, including here and here.

Jim Dempsey has let me know that this show is being rebroadcast TONIGHT.  Check your local listings for playing times.

Thanks Jim!